5417
This number is a prime.
The 17th prime number ending in 17 is 5417. Note that the concatenation in order of all these primes, ending in 17, i.e., from 17 to 5417 is also prime. [Loungrides]
5417^2 and 5418^2 are the smallest pair of consecutive
squares with exactly 666 primes between them. [Gaydos]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell